Metallic object with a thin polyphase oxide coating and process for the manufacture thereof

US6524718B1 · kind B1 · utility

Assignee

• Merck Patent GmbH · DE

Inventors

• Hartmut Worch · Dresden, DE
• Michael Thieme · Chesterfield, US
• Dieter Scharnweber · Dresden, DE
• Sophie Rössler · Dresden, DE
• Martina Stölzel · Freital, DE

Key dates

• Filing date: Jun 21, 1999
• Grant date: Feb 25, 2003
• Expiry date: Jun 21, 2019

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T428/12556
• WIPO field: Surface technology, coating
• WIPO sector: Chemistry

Abstract

A metallic object, having a metallic substrate of a valve metal or a valve metal alloy inclusive of intermetallic phases, and a thin polyphase oxide coating, is disclosed. The polyphase oxide coating has a metal oxide phase and at least one other organic and/or inorganic phase. The polyphase oxide coating is produced by bringing the metallic substrate into contact with an organic and/or inorganic component to be integrated into the polyphase oxide coating such that the inorganic and/or organic phases are present at or in the direct vicinity of the substrate surface and by simultaneously or subsequently anodically polarizing the substrate material in an electrolytic solution.